Update list of trybots used by https://goto.google.com/HowToLandSkiaChangesThatChangeWebkitLayoutTests
Update list of trybots used by https://goto.google.com/HowToLandSkiaChangesThatChangeWebkitLayoutTests

TBR=reed
Review URL: https://codereview.appspot.com/6250071

csulmone/skia,csulmone/skia,csulmone/skia,csulmone/skia